[b]Garge conversion and building regulations[/b]

Their issue is that its not certified for flat roofs, regardless of its effectiveness, and the fact the manufacturer state that its suitable for use in small extensions etc as long as it is ventilated. They just want a certified product.
 
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Your right as ever Shy but there are different u-value requirements that relate to where the insulation is to be installed.We have been told that triso etc is not acceptable in pitch roof situations on its own either :rolleyes:
 
• Can ACTIS TRISO-SUPER 10 be used within flat roofs?
ACTIS has not tested TRISO-SUPER 10 in a flat roof application, so is not qualified to offer a solution based on testing and
certification. TRISO-SUPER 10 is primarily designed, tested and certified for pitched roof applications; however it can be used for
insulation in a flat roof subject to the following: TRISO-SUPER 10 does not have certification for use in flat roofs, so you should
always refer to your local Building Control for project approval before installation. TRISO-SUPER 10 is only suitable for simple
flat roofs, used in domestic scale architecture, for areas such as dormer roofs and extensions. Ventilation of the void below the
impervious waterproof surface finish is essential. If good cross flow ventilation cannot be provided then TRISO- SUPER 10 should
not be used.

From www.actis-isolation.com/pdf/11pdf33.pdf
 
Mik, the whole situation is completely mad, with the government refusing to instruct LABCs to look at the issue of multifoils in a specific manner, so most won't accept it, but approved inspectors will. I believe that Devon is one of only a few LABCs who will accept its use on its own.

The whole theory of U values is fundamentally flawed, in any event.
 
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Finish all the work, and use the extension.

If at some future time you decide to sell, then either sell it as store, or sell it as a room and pay £50 for the stupid indemnity insurance which will keep everyone happy and be cheaper than doing the work which BC want.

Sorted
 

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